液滴法制备高尺度比玻璃微球壳的研究
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摘要: 定量给出了液滴法制备玻璃微球壳（HGM）的直径与壁厚之间的依存关系,确定了制备大直径薄壁HGM的液滴炉温度分布、抽气速率、溶液浓度和液滴发生器操作参数等工艺条件,制备出直径为300～450μm、壁厚为0.7～1.2μm、尺度比为300～700的HGM,表面粗糙度优于10nm,球形度和同心度均优于97%,耐外压能力大于0.91MPa,耐内压能力至少大于0.43MPa。Abstract: The quantitative relationship between out diameter (O.D.) and thickness of hollow glass microspheres (HGM) made by liquid droplet method is given. The operation conditions, such as distributions of temperature and purge gas velocit y in the furnace, concentrations of solution, and the operation conditions of th e droplet generator, are experimentally optimized, under which HGM is produced with O.D. of 300~450μm, wall thickness of 0.7~1.2μm, aspect ratio of 300~700, surface roughness better than 10nm, concentricity better than 97%, sphericity higher than 99%, and out and inner failure pressures more than 0.91MPa and 0.43MPa respectively.
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